Freakonomics author Steve Levitt noted this: http://freakonomics.blogs.nytimes.com/2008/07/28/from-good-to-great-to-below-average/ http://freakonomics.blogs.ny

Freakonomics author Steve Levitt noted this: http://freakonomics.blogs.nytimes.com/2008/07/28/from-good-to-great-to-below-average/ http://freakonomics.blogs.nytimes.com/2008/07/28/from-good-t...